Using ctr to push to harbor registry

[cwrx777]

harbor version: 2.10, images obtained from the offline installer
harbor helm: 1.14.0

I'm running harbor as part of k3s (v1.29) cluster.
In k3s master, i have configured registries.yaml as such:

mirrors:
  <REGISTRY>:
    endpoint:
      - "https://<REGISTRY>/v2"
configs:
   <REGISTRY>:
    auth:
      username: <username>
      password: <password>
    tls:
      cert_file: <path to tls.crt>
      key_file:  <path to tls.key>
      ca_file:   <path to ca.crt>
      insecure_skip_verify: true

for user accounts, I have created two user accounts:

1. user account, for logging into UI
   • it is also a Maintainer on library project
   • it is the account that is configured in the above registries.yaml
2. robot account in library project, with permission;
   • repository: push,pull

I used the following to push:

sudo ctr image push --user "$USERNAME:$PASSWORD" <REGISTRY>/library/xxxx/yyyyyy:tag

Result of both user account and robot account:

ctr: unexpected status from POST request to https://<REGISTRY>/v2/library/xxxx/yyyyyy/blobs/uploads/: 401 Unauthorized

[MinerYang]

Have you using correct credential and for specific cluster you should ask and refer to https://docs.k3s.io/installation/private-registry